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TDA4454 - Multistandard VIF Amplifier and PLL Demodulator

General Description

This multistandard video IF processing circuit with PLL picture carrier regeneration gives a high performance of linear video demodulation.

The IF signal is internally fed via a 3-stage controlled wideband amplifier to the video demodulator and the phase detector.

Key Features

  • D Suitable for standard B/G, L and D2MAC, processes negative and positive modulated IF-signals with equal polarity of the output signal D D2MAC: fast AGC acting on peak level with controlled capacitor discharge D High performance video demodulator with PLL picture carrier regeneration D Output for delayed tuner-AGC, take over point adjustable D Extended video bandwidth (12 MHz) for the demodulation of amplitude modulated MAC-signals D High input sensitivity D Ultra white and ultra black lim.

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Other Datasheets by TEMIC Semiconductors (now Microchip)

Part Number Description
TDA4452 Video IF Amplifier for Multistandard TV Receiver and VTR Appliances
TDA4453 Video IF Amplifier for Multistandard TV Receiver and VTR Appliances
TDA4455 Multistandard VIF Amplifier and PLL Demodulator
TDA4439 Video IF Amplifier for Multistandard TV and VTR
TDA4445A Quasi Parallel Sound Processing with Quadrature Intercarrier Demodulator

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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TELEFUNKEN Semiconductors TDA4454 Multistandard VIF Amplifier and PLL Demodulator Application Monolithic integrated circuit for vision IF signal processing in multistandard TV and VTR sets. Description This multistandard video IF processing circuit with PLL picture carrier regeneration gives a high performance of linear video demodulation. The IF signal is internally fed via a 3-stage controlled wideband amplifier to the video demodulator and the phase detector. The phase detector compares the phase of IF signal (0°) with the output signal of the VCO (90°) and sets the VCO frequency accordingly. A lock detector switches the PLL loop filter according to the state of the PLL (locked-PLL slow, unlocked-PLL fast).